CN111591490A

CN111591490A - Ribbon binding machine

Info

Publication number: CN111591490A
Application number: CN202010546060.9A
Authority: CN
Inventors: 贾勇
Original assignee: Individual
Current assignee: Individual
Priority date: 2020-06-16
Filing date: 2020-06-16
Publication date: 2020-08-28

Abstract

The invention discloses a ribbon binding machine, which comprises a shell, a rack arranged on the shell and a guide claw arranged on the rack, wherein the guide claw comprises a first guide claw and a second guide claw which are respectively hinged on the rack and are matched with each other correspondingly; the first guide claw is driven by a push rod and an air cylinder to hook inwards, and the air cylinder drives the push rod to move; a through hole which penetrates through the upper end surface and the lower end surface of the push rod and can be penetrated by the tail part of the binding belt is arranged in the push rod; a bevel extending from the front or rear of the through hole to the through hole is provided on the wall surface of the through hole to form a cutter on the front or rear side of the through hole correspondingly. According to the invention, the cutter is arranged on the push rod, so that the tail part of the binding belt can be cut off when the cylinder drives the push rod to reset, the cutter is driven independently to cut the binding belt without other driving mechanisms, and the first guide claw and the cutter can be driven simultaneously by one cylinder.

Description

Ribbon binding machine

Technical Field

The invention relates to the technical field of automatic strapping tapes, in particular to a strapping machine.

Background

For the automatic bundling of common nylon ribbon, a desktop type ribbon bundling machine design is provided domestically, and the machine has the following defects: the machine is fixed and can only move the workpiece, so the use is not flexible; due to space limitation, it cannot be used for on-site or internal construction of pipelines, tunnels or aerial cables of airplanes, ships, trains, automobiles, points, communication equipment, and the like; the desktop type belt bundling machine also has some defects in design, and is inconvenient and unreliable in use; moreover, desktop type automatic strapping machines on the market generally adopt five motors to drive, waste parts and have huge volumes. The prior art is that the tape binding machine comprises a housing, a frame arranged in the housing, a guide claw arranged on the frame, a guide claw driving mechanism for driving the guide claw, and a cutter mechanism for cutting off the tape, wherein the cutter mechanism comprises a cutter and a cutter driving mechanism for driving the cutter, the guide claw comprises a first guide claw and a second guide claw, and the first guide claw and the second guide claw need to be driven by the guide claw driving mechanism respectively. However, the belt binding machine with the structure has certain problems, such as complex structure, and the belt cutting machine needs to be driven by a separate cutter to cut the belt, so that the machine is too bulky and the production cost is increased; meanwhile, the structure also causes the machine to be easily damaged due to excessive parts, thereby increasing the maintenance cost and the overhauling difficulty.

Disclosure of Invention

In view of the problems in the prior art, the invention aims to provide a strapping machine, which simplifies the structure, and makes the machine overall simple and reasonable, so that the machine overall small and exquisite, convenient to overhaul and maintain, low in production cost and prolonged in service life.

In order to achieve the purpose, the technical scheme of the invention is as follows:

a strapping machine comprises a shell, a rack arranged on the shell and a guide claw arranged on the rack, wherein the guide claw comprises a first guide claw and a second guide claw which are respectively hinged on the rack and are matched with each other correspondingly; the first guide claw is hooked inwards by the driving of a push rod and an air cylinder, and the air cylinder drives the push rod to move; a through hole which penetrates through the upper end surface and the lower end surface of the push rod and can be penetrated by the tail part of the binding belt is arranged in the push rod; a bevel extending from the front or the back of the perforation to the perforation is arranged on the wall surface of the perforation so as to form a cutter connected with the perforation on the front side or the back side of the perforation correspondingly; the cylinder drive during the action of push rod, drive first direction claw is inwards colluded when the cylinder resets, drives the push rod resets just the cutter cuts off the ribbon.

As a specific embodiment, the front end of the push rod is hinged with the rear end of the first guide claw, and the rear end of the push rod is fixedly connected with the cylinder; the cutter is disposed at a front side of the perforation.

As a specific embodiment, the cutting knife is integrally formed with the push rod or detachably connected thereto.

As a specific embodiment, a trigger for controlling the second guide claw to turn up and down is further hinged on the frame.

Furthermore, the ribbon binding machine also comprises an in-place sensing mechanism; the in-place sensing mechanism comprises a sensing rod fixedly connected with the trigger and a sensor which is fixed on the rack and used for sensing the sensing rod.

As a specific embodiment, the strapping machine further comprises a tensioning mechanism; the tensioning mechanism comprises a drawstring driving wheel positioned above the perforation, at least one drawstring driven wheel matched with the drawstring driving wheel, and a motor for driving the drawstring driving wheel and the drawstring driven wheel; the drawstring driving wheel and the drawstring driven wheel are arranged on the rack.

Furthermore, the tensioning mechanism also comprises a twisting force adjustable device of the strapping machine; the torsion adjustable device of the strapping machine comprises a base, a rotating shaft, a pressing piece, an elastic piece and a positioning piece; the base is rotatably arranged on the rack and driven by the motor, a slot is arranged on the base, and at least one embedding position is arranged on the side wall of the slot; the rotating shaft is in transmission connection with the drawstring driving wheel, and one end of the rotating shaft is inserted into the slot; the elastic part and the pressing part are sequentially arranged in the rotating shaft along the length direction of the rotating shaft, and one end of the pressing part is connected with one end of the elastic part; the positioning piece is provided with at least one positioning piece which is clamped on the side wall of the rotating shaft, one end of the positioning piece extends out of the rotating shaft and is matched with the embedding position, the end surface of the end, extending out of the rotating shaft, of the positioning piece is an arc-shaped surface, and the other end of the positioning piece is movably connected with the other end of the pressing piece; the other end of the rotating shaft is in threaded connection with a screw rod, and one end of the screw rod is connected with the other end of the elastic piece; the pressing piece moves upwards and the elastic piece contracts through inward contraction of the positioning piece.

Furthermore, four positioning pieces and four embedding positions are arranged; the four positioning pieces are uniformly distributed on the side wall of the rotating shaft; the four embedding positions are uniformly distributed on the side wall of the slot.

Further, the elastic piece is a spring or elastic glue; the pressing piece and the positioning piece are both steel balls.

The invention has the beneficial effects that:

(1) the invention simplifies the structure, so that the whole machine is simple and reasonable, thereby being small and exquisite, facilitating the overhaul and maintenance, reducing the production cost and prolonging the service life.

(2) The first guide claw is driven to move by the air cylinder and the push rod, and the driving mode is stable and effective; simultaneously, set up the cutter on the push rod for can cut off the afterbody of ribbon when cylinder drive push rod resets, and do not need other actuating mechanism to drive the cutter alone and cut the area, a cylinder just can realize driving first direction claw and cutter simultaneously promptly, has simplified the structure widely, has practiced thrift the manufacturing cost of machine, convenient to use, and the practicality is strong.

(3) The invention can facilitate the control system to give signals to the cylinder by arranging the in-place sensing mechanism.

(4) The torsion adjustable device of the strapping machine can prevent parts such as a motor and the like from being damaged due to overlarge tensioning tension moment of the strapping tape when the strapping tape is tensioned by the strap driving wheel and the strap driven wheel, so that the damage of the whole machine is prevented; the torsion of the torsion adjustable device of the belt bundling machine can be conveniently adjusted through the screw rod, so that the tension of a bundling belt can be set.

(5) The torsion adjustable device of the strapping machine has the advantages of simple structure, convenience in assembly, low production cost, practicability and the like.

Drawings

FIG. 1 is a schematic view of the overall structure of the present invention;

FIG. 2 is an exploded view of the present invention;

FIG. 3 is a schematic view of a partial structure of the present invention;

FIG. 4 is a schematic view of the construction of the push rod and cutter of the present invention;

FIG. 5 is a schematic view of the overall structure of the torsion adjustable device of the belt binding machine of the present invention;

fig. 6 is an exploded view of the torque adjustable device of the strapping machine of the present invention.

Reference numerals:

1. a housing; 2. a frame; 21. a locking position; 3. a guide claw; 31. a first guide claw; 32. a second guide claw; 4. a strap guide; 5. a push rod; 51. perforating; 52. a hinge hole; 6. a cylinder; 7. a cutter; 8. a trigger; 9. an induction rod; 10. an inductor; 11. a belt driving wheel is drawn; 12. pulling a belt driven wheel; 13. a motor; 14. a torsion adjustable device of the strapping machine; 141. a base; 142. a rotating shaft; 143. pressing parts; 144. an elastic member; 145. a positioning member; 146. a slot; 147. embedding in place; 148. a transmission gear; 149. a screw.

Detailed Description

The invention will be further elucidated with reference to the drawings and the embodiments, which are exemplary only and do not limit the scope of the invention.

As shown in fig. 1 and fig. 6, for convenience of description, one end of the belt bundling machine provided with the guide claw 3 is defined as a front end of the belt bundling machine, and the other end of the belt bundling machine is defined as a rear end; a belt binding machine comprises a shell 1, a machine frame 2 arranged on the shell 1, a guide claw 3 arranged on the machine frame 2 and a belt guide rail 4 arranged on the machine frame 2, wherein the guide claw 3 comprises a first guide column 31 and a second guide claw 32 which are respectively hinged on the machine frame 2 and are matched with each other correspondingly, and guide grooves 30 matched with each other are formed in the belt guide rail 4, the first guide claw 31 and the second guide claw 32 so as to guide the operation of a belt; the first guide claw 31 is hooked inwards by being driven by a push rod 5 and an air cylinder 6, the air cylinder 6 drives the push rod 5 to move, specifically, the air cylinder 6 is fixed in the shell 1, and the front end of the push rod 5 penetrates through the rack 2; a through hole 51 which penetrates through the upper end surface and the lower end surface of the push rod 5 and can be used for the tail part of the binding belt to pass through is arranged in the push rod; a slope extending from the front or rear of the through hole 51 toward the through hole 51 is provided on the wall surface of the through hole 51 to form a cutter 7 connected to the through hole 51 at the front or rear side of the through hole 51, respectively, i.e., when the slope extends from the front of the through hole 51 toward the through hole 51, the cutter 7 is disposed at the front side of the through hole 51 with its edge facing backward, and when the slope extends from the rear of the through hole 51 toward the through hole 51, the cutter 7 is disposed at the rear side of the through hole 51 with its edge facing forward. When the cylinder 6 drives the push rod 5 to act, the first guide claw 31 is driven to hook inwards, and when the cylinder 6 resets, the push rod 5 is driven to reset and the cutter 7 cuts off the ribbon. In the embodiment, the front end of the push rod 5 is hinged with the rear end of the first guide claw 31 through a hinge hole 52, and the rear end of the push rod 5 is fixedly connected with the cylinder 6; at this time, as shown in fig. 4, the cutting knife 7 is disposed at the front side of the through hole 51, and the cutting edge of the cutting knife 7 faces the rear side of the through hole 51, and this connection structure causes the first guide claw 31 to hook inward when the push rod 5 moves forward, and cuts the tail of the band when the push rod 5 moves backward. However, it should be understood by those skilled in the art that a link mechanism (not shown) may be connected between the push rod 5 and the first guide jaw 31 to drive the first guide jaw 31 to hook inward when the push rod 5 is driven to move backward by the cylinder 6, and the cutting knife 7 is disposed at the rear side of the through hole 51 and the cutting edge of the cutting knife 7 faces the front side of the through hole 51, so that the connecting structure can cut off the tail of the band when the cutting knife 7 moves forward.

Preferably, the inclined surface penetrates upper and lower end surfaces of the push rod 5.

Preferably, the cutter 7 and the push rod 5 can be integrally formed or the cutter 7 and the push rod 5 can be detachably connected. For the convenience of production, in the present embodiment, the cutter 7 is integrally formed with the push rod 5.

Preferably, a sliding groove for sliding the push rod 5 is further provided in the frame 2, so that the push rod 5 does not deviate from the preset route and the push rod 5 slides more smoothly.

As shown in fig. 2 and 3, a trigger 8 for controlling the second guide pawl 32 to turn up and down is further hinged on the frame 2, and specifically, the trigger 8 is connected with the second guide pawl 32 through a connecting rod, and since this connecting structure is prior art, detailed description is omitted here.

Specifically, as shown in fig. 2 and 3, the strapping machine further comprises a position sensing mechanism; the in-place sensing mechanism comprises a sensing rod 9 fixedly connected with the trigger 8 and a sensor 10 which is fixed on the frame 2 and is used for sensing the sensing rod 9. Specifically, the sensor 10 is a photoelectric sensor, and the sensing rod 9 is disposed obliquely. The position sensing mechanism is specifically used in such a manner that, when the trigger 8 is pressed upward to turn the second guide claw 32 upward to close the first guide claw 31, at this time, since the sensing rod 9 is fixedly connected with the trigger 8, the sensing rod 9 will move upwards synchronously until the sensing rod 9 moves to the sensor 10 and is sensed by the sensor 10, the system then controls a feed mechanism (not shown) behind the strap guide 4 to feed the strap into the strap guide 4, and through the strap guide 4 to the first and second guide jaws 31, 32, then, the head of the band is locked by the locking position 21 arranged on the frame 2, and the tail of the band is guided by the guide slot of the first guide claw 31 and the guide slot of the second guide claw 32, and then a part of the tail of the band penetrates into the hole of the head of the band and the part of the tail of the band also penetrates into a through hole (not shown) in the locking position 21; then, the cylinder 6 is started to push the push rod 5 to move forwards, so that the first guide claw 31 is driven to hook inwards, the tail of the ribbon moves upwards, the through hole 51 is just aligned to the through hole in the locking position 21 in the moving process of the push rod 5, and the first guide claw 31 can push the tail of the ribbon to smoothly pass through the through hole 51 in the moving process; then, when the air cylinder 6 is reset, the push rod 5 is driven to move backwards, so that the tail part of the binding belt can be cut off.

As shown in fig. 2 and 3, the strapping machine further comprises a tensioning mechanism; the tensioning mechanism comprises a drawstring driving wheel 11 positioned above the perforation 51, at least one drawstring driven wheel 12 matched with the drawstring driving wheel 11, and a motor 13 for driving the drawstring driving wheel 11 and the drawstring driven wheel 12. Preferably, two driven wheels 12 of the drawstring are provided; the drawstring driving wheel 11 and the drawstring driven wheel 12 are both arranged on the frame 2. Preferably, gears which are coaxially and fixedly connected with the belt driving wheel 11 and the belt driven wheel 12 respectively and are meshed with each other are further arranged outside the belt driving wheel 11 and the belt driven wheel 12, and the motor 13 transmits force to the gears so as to drive the belt driving wheel 11 and the pull point driven wheel 12 to move. Since the above parts are prior art, detailed descriptions are omitted here. When the tail of the binding tape upwards passes through the through hole 51, the binding tape enters a gap between the draw tape driving wheel 11 and the draw tape driven wheel 12, is tensioned by the draw tape driving wheel 11 and the draw tape driven wheel 12 and continuously has a tendency of upwards moving until the binding tape is not pulled by the draw tape driving wheel 11 and the draw tape driven wheel 12, so that the binding tape finishes binding the objects, and then the cutter 7 is used for cutting off the tail of the binding tape.

Preferably, as shown in fig. 5 and 6, the tensioning mechanism comprises a twisting force adjustable device 14 of the belt binder, and the twisting force adjustable device 14 of the belt binder is arranged on the frame 2; the torsion adjustable device 14 of the strapping machine comprises a base 141, a rotating shaft 142, a pressing piece 143, an elastic piece 144 and a positioning piece 145; the base 141 is rotatably disposed on the rack 2 and driven by the motor 13, a slot 146 is disposed on the base 141, and at least one insertion position 147 is disposed on a sidewall of the slot 146; the rotating shaft 142 is in transmission connection with the drawstring driving wheel 11, and one end of the rotating shaft 142 is inserted into the slot 146; the elastic member 144 and the pressing member 143 are sequentially disposed in the rotating shaft 142 along the length direction of the rotating shaft 142, and one end of the pressing member 143 is connected to one end of the elastic member 144; the positioning element 145 is provided with at least one positioning element and is clamped on the side wall of the rotating shaft 142, one end of the positioning element 145 extends out of the rotating shaft 142 and is matched with the embedding position 147, the end surface of the end (namely the outer end) of the positioning element 145 extending out of the rotating shaft 142 is an arc-shaped surface, the other end (namely the inner end) of the positioning element 145 is movably connected with the other end of the pressing element 143, and in order to facilitate the matching of the positioning element 145 and the embedding position 147, the side wall of the embedding position 147 is also an arc-shaped surface; a screw 149 is connected to the other end of the rotating shaft 142 in a threaded manner, one end of the screw 149 is connected with the other end of the elastic member 144, and the tension of the binding belt can be set by arranging the screw 149; by the inward contraction of the positioning member 145, the pressing member 143 is moved upward and the elastic member 144 is contracted. Preferably, the elastic member 144 is a spring or an elastic glue, and in this embodiment, the elastic member 144 is a spring; and the pressing member 143 and the positioning member 145 are steel balls. A locking hole having a diameter smaller than that of the positioning member 145 is formed on a sidewall of the rotation shaft 142 so that the positioning member 145 does not come off the rotation shaft 2. Preferably, in the present embodiment, there are four positioning members 145 and four insertion positions 147; the four positioning members 145 are uniformly distributed on the side wall of the rotating shaft 142, so that the pressing member 143 is stressed more uniformly and moves more stably; the four embedding places 147 are evenly distributed on the side wall of the slot 146; it should be understood by those skilled in the art that the number of the positioning portions 145 and the embedding bits 147 is not limited to four, and the number thereof may be increased or decreased as appropriate. A transmission gear 148 is fixed on the outer wall of the rotating shaft 142, the rotating shaft 142 is in transmission connection with the drawstring driving wheel 11 through the transmission gear 148, the specific setting mode is that the transmission gear 148 is in transmission connection with the gear coaxially and fixedly connected with the drawstring driving wheel 11, for better transmission between the motor 13 and the torque adjustable device 14 of the strapping machine and the drawstring driving wheel 11, a gear assembly can be arranged between the motor 13 and the base 141, and a gear assembly is also arranged between the transmission gear 148 and the gear coaxially and fixedly connected with the drawstring driving wheel 11, so that the transmission is more reasonable and stable, the gear assembly comprises a planetary gear, an inner gear, an outer gear and the like, and detailed description is omitted. The torsion adjustable device 14 of the belt binding machine is used in the principle that the base 141 rotates by the driving of the motor 13, the positioning member 145 is embedded into the embedding position 147, so that the base 141 rotates to drive the rotating shaft 142 to rotate synchronously, when the rotating shaft 142 rotates, the force is transmitted to the belt driving wheel 11 and the belt driven wheel 12 through the transmission gear 148, so that the belt driving wheel 11 and the belt driven wheel 12 can pull the tail of the belt to rise upwards to bind the belt in the article, when the tension moment of the belt reaches or exceeds the preset moment of the elastic member 144, the rotating shaft 142 stops rotating, the positioning member 145 is forced to contract, so that the pressing member 143 is driven to move towards the elastic member 144, the elastic member 144 also contracts, at this time, the positioning member 145 contracts inwards, so that the rotating shaft 142 cannot be damaged even if the base 141 continues to rotate, and the belt driving wheel 11 and the belt driven wheel 12 are prevented from being pulled apart, in the rotating process of the base 141, when the embedded position 147 rotates to the position of the positioning element 145, the positioning element 145 is extended by the elastic force of the elastic element 144, and the positioning element 145 contracts inwards along with the continuous rotation of the base 141, and the reciprocating process is continuously circulated; after the strap between the strap driving wheel 11 and the strap driven wheel 12 is detached, the strap driving wheel 11, the strap driven wheel 12 and the rotating shaft 142 are not subjected to resistance any more, so that the rotating shaft 142, the strap driving wheel 11 and the strap driven wheel 12 continue to rotate along with the base 141.

Of course, a waste passage, an air pipe, etc. are also provided in the frame 2, but these are all the prior art and will not be described in detail here.

The working principle of the invention is described below in order to understand the invention:

firstly, the trigger 8 is pressed to close the first guide claw 31 and the second guide claw 32, the induction rod 9 moves upwards and is induced by the inductor 10, the motor 13 is started, and the drawstring driving wheel 11 and the drawstring driven wheel 12 are driven to move by the torsion adjustable device 14 of the belt bundling machine; the feeding mechanism feeds and conveys the ribbon into the guide groove of the ribbon guide rail 4, and then the ribbon sequentially penetrates into the guide groove of the first guide claw 31 and the guide groove of the second guide claw 32, and at the moment, a part of the tail of the ribbon penetrates into the hole at the head of the ribbon; after the cylinder 6 is started, the push rod 5 is pushed forwards, and meanwhile, the first guide claw 31 is driven to hook inwards, so that the tail of the binding tape passes through the through hole 51 of the push rod 5 and is tensioned by the pull tape driving wheel 11 and the pull tape driven wheel 12; when the strap can not be pulled any more to force the strap driving wheel 11 and the strap driven wheel 12 to stop, the rotating shaft 142 also stops synchronously, and the positioning piece 145 is forced to do reciprocating motion of contraction and extension on the rotating shaft 142 due to the continuous rotation of the base 141; finally, the air cylinder 6 is reset, so that the push rod 5 synchronously moves backwards, when the push rod 5 moves, the cutter 7 cuts off the tail of the binding tape in the through hole 51, the air pipe discharges waste materials after the tail of the binding tape is cut off, the binding process of the binding tape to the objects is completed, and then the motor continuously drives the tensioning mechanism to act.

The present invention is not limited to the above-described embodiments, and various modifications and variations of the present invention are intended to be included within the scope of the claims and the equivalent technology of the present invention if they do not depart from the spirit and scope of the present invention.

Claims

1. The utility model provides a ribbon machine, is in including shell, setting frame and setting on the shell are in direction claw in the frame, the direction claw articulates including respectively in the frame and correspond first direction claw of complex and second direction claw each other first direction claw with all set up the guide way of mutually supporting on the second direction claw to with the ribbon operation direction, its characterized in that:

the first guide claw is hooked inwards by the driving of a push rod and an air cylinder, and the air cylinder drives the push rod to move; a through hole which penetrates through the upper end surface and the lower end surface of the push rod and can be penetrated by the tail part of the binding belt is arranged in the push rod; a bevel extending from the front or the back of the perforation to the perforation is arranged on the wall surface of the perforation so as to form a cutter connected with the perforation on the front side or the back side of the perforation correspondingly; the cylinder drive during the action of push rod, drive first direction claw is inwards colluded when the cylinder resets, drives the push rod resets just the cutter cuts off the ribbon.

2. The strapping machine of claim 1 wherein:

the front end of the push rod is hinged with the rear end of the first guide claw, and the rear end of the push rod is fixedly connected with the air cylinder; the cutter is disposed at a front side of the perforation.

3. The strapping machine of claim 1 wherein:

the cutter and the push rod are integrally formed or detachably connected.

4. The strapping machine of claim 1 wherein:

the inclined plane penetrates through the upper end face and the lower end face of the push rod.

5. The strapping machine of claim 1 wherein:

and a trigger for controlling the second guide claw to overturn up and down is hinged on the rack.

6. The strapping machine of claim 5 wherein:

the ribbon binding machine also comprises an in-place sensing mechanism; the in-place sensing mechanism comprises a sensing rod fixedly connected with the trigger and a sensor which is fixed on the rack and used for sensing the sensing rod.

7. The strapping machine of claim 1 wherein:

the belt bundling machine also comprises a tensioning mechanism; the tensioning mechanism comprises a drawstring driving wheel positioned above the perforation, at least one drawstring driven wheel matched with the drawstring driving wheel, and a motor for driving the drawstring driving wheel and the drawstring driven wheel; the drawstring driving wheel and the drawstring driven wheel are arranged on the rack.

8. The strapping machine of claim 7 wherein:

the tensioning mechanism also comprises a torsion adjustable device of the strapping machine; the torsion adjustable device of the strapping machine comprises a base, a rotating shaft, a pressing piece, an elastic piece and a positioning piece; the base is rotatably arranged on the rack and driven by the motor, a slot is arranged on the base, and at least one embedding position is arranged on the side wall of the slot; the rotating shaft is in transmission connection with the drawstring driving wheel, and one end of the rotating shaft is inserted into the slot; the elastic part and the pressing part are sequentially arranged in the rotating shaft along the length direction of the rotating shaft, and one end of the pressing part is connected with one end of the elastic part; the positioning piece is provided with at least one positioning piece which is clamped on the side wall of the rotating shaft, one end of the positioning piece extends out of the rotating shaft and is matched with the embedding position, the end surface of the end, extending out of the rotating shaft, of the positioning piece is an arc-shaped surface, and the other end of the positioning piece is movably connected with the other end of the pressing piece; the other end of the rotating shaft is in threaded connection with a screw rod, and one end of the screw rod is connected with the other end of the elastic piece; the pressing piece moves upwards and the elastic piece contracts through inward contraction of the positioning piece.

9. The strapping machine of claim 8 wherein:

four positioning pieces and four embedding positions are arranged; the four positioning pieces are uniformly distributed on the side wall of the rotating shaft; the four embedding positions are uniformly distributed on the side wall of the slot.

10. The strapping machine of claim 8 wherein:

the elastic piece is a spring or elastic glue; the pressing piece and the positioning piece are both steel balls.